Nokia RM-42 Service Manual

Also see for RM-42: Service manual

Contents

• Common mode voltage is a mean value of high and low states of one single-ended signal.• Differential voltage swing is differential amplitude between signals of differential pair.• Differential transitions should be only measured with good equipment (bandwith > 1GHz),otherwise results will seem too slow.Table 32 Camera system regulators IF electrical characteristicsDescription Parameter Min Typ Max Unit NotesVcam1V5regulatorenableVOH V Helen3 GPIOHigh-leveloutputvoltageVcam1V5regulatorenableVOL V Helen3 GPIOLow-leveloutputvoltageVcam2V8regulatorenableVOH V Helen3 GPIOHigh-leveloutputvoltageVcam2V8regulatorenableVOL V Helen3 GPIOLow-leveloutputvoltageBack-up battery interface connections and electrical characteristicsTable 33 Back-up battery connectionsPin name I/O Connection NotesL2207, VBack -> Retu, VBack Back-up battery G2200 is connected to RETU viacoilTable 34 Back-up battery electrical characteristicsDescription Parameter Min Typ Max UnitBack-UpBattery VoltageVback 0 2.5 2.7 VRF descriptionIntroduction to receiver functionalityReceiver functions are implemented in RF ASIC N7500.The receiver is a linear direct conversion receiver consisting of separate front ends (LNA and demodulator) foreach supported system.After the demodulators, the signal paths are combined to one common BB path.RM-42Nokia Customer Care System ModulePage 9–46 Company Confidential 9241872 (Issue 1)Copyright ©2005 Nokia. All Rights Reserved.